I've just started experimenting with these varieties and I'm enjoying them a lot. I've tried liberty and sterling so far, I would agree that the sterling has a note of American style citrus hop but a lot of spice, at least the crop that I got. I'm going to be exploring them a lot more I think so this thread is timely for me.

IIRC, in a Zymurgy article about pils and hops, Ted Hausotter found Mt. Hood to be the closest to Mittelfruh.

That was true. I think he also stated that if you want Hallertau Mittelfrueh, make sure that is what you are buying. Generic Hallertau could Hallertau Gold, Hallertau Tradition, or whatever the brokers ship.

Of the German varieties, I think Hallertau tradition is not too far off.

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Jeff RankertAnn Arbor Brewers GuildAHA Governing Committee BJCP NationalHome-brewing, not just a hobby, it is a lifestyle!

This is interesting to hear because I've been using US Tettnang in German lagers (perhaps based on Paul's recommendation) and have been really pleased with the results. The beers have also performed well in competitions.